Long-Term Debt (Based on Stated Maturity Dates Rather than Early Redemption Dates that Could be Elected by Instrument Holders) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014
Debt Instrument [Line Items]
2014	$ 861,000,000
2015	1,327,000,000
2016	1,429,000,000
2017	1,350,000,000
2018	2,550,000,000
Thereafter	15,683,000,000
Total	23,200,000,000
5.25% Senior Notes Due 2033
Debt Instrument [Line Items]
Senior notes	510,000,000
Interest rate (percentage)	5.25%
Redemption percentage of principal and accrued interest	100.00%
Dominion Gas Holdings, LLC
Debt Instrument [Line Items]
2014	0
2015	400,000,000
2016	0
2017	0
2018	450,000,000
Thereafter	1,750,000,000
Total	2,600,000,000
Virginia Electric and Power Company
Debt Instrument [Line Items]
2014	211,000,000
2015	476,000,000
2016	679,000,000
2017	850,000,000
2018	350,000,000
Thereafter	6,369,000,000
Total	8,935,000,000
2015
Debt Instrument [Line Items]
Weighted-average Coupon	2.14%
2015 | Virginia Electric and Power Company
Debt Instrument [Line Items]
Weighted-average Coupon	5.39%
2016
Debt Instrument [Line Items]
Weighted-average Coupon	2.86%
2016 | Dominion Gas Holdings, LLC
Debt Instrument [Line Items]
Weighted-average Coupon	1.05%
2016 | Virginia Electric and Power Company
Debt Instrument [Line Items]
Weighted-average Coupon	5.24%
2017
Debt Instrument [Line Items]
Weighted-average Coupon	3.27%
2017 | Virginia Electric and Power Company
Debt Instrument [Line Items]
Weighted-average Coupon	5.43%
2018
Debt Instrument [Line Items]
Weighted-average Coupon	4.99%
2018 | Virginia Electric and Power Company
Debt Instrument [Line Items]
Weighted-average Coupon	4.17%
2019
Debt Instrument [Line Items]
Weighted-average Coupon	3.09%
2019 | Dominion Gas Holdings, LLC
Debt Instrument [Line Items]
Weighted-average Coupon	2.50%
2019 | Virginia Electric and Power Company
Debt Instrument [Line Items]
Weighted-average Coupon	5.00%
Thereafter
Debt Instrument [Line Items]
Weighted-average Coupon	4.39%
Thereafter | Dominion Gas Holdings, LLC
Debt Instrument [Line Items]
Weighted-average Coupon	4.15%
Thereafter | Virginia Electric and Power Company
Debt Instrument [Line Items]
Weighted-average Coupon	4.64%
Unsecured Senior Notes(1)
Debt Instrument [Line Items]
2014	861,000,000	[1]
2015	1,308,000,000	[1]
2016	1,354,000,000	[1]
2017	1,350,000,000	[1]
2018	2,000,000,000	[1]
Thereafter	11,878,000,000	[1]
Total	18,751,000,000	[1]
Tax-Exempt Financings
Debt Instrument [Line Items]
2014	0
2015	19,000,000
2016	75,000,000
2017	0
2018	0
Thereafter	880,000,000
Total	974,000,000
Unsecured Junior Subordinated Notes Payable to Affiliated Trusts
Debt Instrument [Line Items]
2014	0
2015	0
2016	0
2017	0
2018	0
Thereafter	10,000,000
Total	10,000,000
Enhanced Junior Subordinated Notes
Debt Instrument [Line Items]
2014	0
2015	0
2016	0
2017	0
2018	0
Thereafter	1,365,000,000
Total	1,365,000,000
Remarketable Subordinated Notes
Debt Instrument [Line Items]
2014	0
2015	0
2016	0
2017	0
2018	550,000,000
Thereafter	1,550,000,000
Total	$ 2,100,000,000

[1] At the option of holders, $510 million of Dominion's 5.25% senior notes due 2033 are subject to redemption at 100% of the principal amount plus accrued interest in August 2015. As a result, at December 31, 2014, the notes were included in Securities due within one year in the Consolidated Balance Sheets.